Simplify (a+b)^3-(a-b)^3-6b(a^2-b^2). Simplify (x+y)^3-(x-y)^3-6y(x^2-y^2). @AviJainClasses

Uploaded May 2019 | Updated September 2026, 2 weeks ago

Simplify (a+b)^3-(a-b)^3-6b(a^2-b^2).Simplify (x+y)^3-(x-y)^3-6y(x^2-y^2). Class 9 maths. Polynomials class 9. Question from R D Sharma.
This is an important question from polynomials class 9 maths.
some important questions from chapter 2 class 9 polynomials are as follows:

1) Factorise: x^2+1/x^2+2. Factorise x^2+1/x^2. Factorise x^2+1/x^2+1. polynomials class 9 chapter 2.
youtu.be/Rn9hKYFf_T8

2) Factorise x^8-y^8. Factorise x^4+y^4. Factorise x^4-y^4. Factorise x^8+y^8. Factorise x^2+y^2.
youtu.be/e5ByU8k-fcQ

3) if x+1/x=3 then find the value of x^3+1/x^3. if x+1/x=6 find x2+1/x2. Polynomials class 9. Maths.
youtu.be/zKAETkEUfEw

4) if a+b+c=6 find the value of (2-a)^3+(2-b)^3+(2-c)^3-3(2-a)(2-b)(2-c). Polynomials class 9. Maths.
youtu.be/6nDV1YtvZlc

5) Find the value of x^3+y^3+15xy-125 when x+y=5 . Polynomials class 9 important questions. maths.
youtu.be/S8E8G413D2o

6) Factorise (i) a^2+b^2-2(ab-ac+bc) (ii) 4a^2-9b^2-(2a-3b) (iii) a-b-a2+b2 (iv) 108a^2-3(b-c)^2
youtu.be/n4O1UVLjfAU

7) factorise x^2+1/x^2+2-2x-2/x .factorise x^3-1/x^3-2x+2/x . Polynomials class 9 important questions.
youtu.be/-OEDAVczNag

8) Simplify (a+b)^3 - (a-b)^3 - 6ab(a^2-b^2). Class 9 maths. Polynomials class 9.
youtu.be/ceSfFXP1XQY

9) Factorise x6+5x3+8. Factorise x^6+5x^3+8. Class 9 maths. Polynomials class 9.
youtu.be/VLzw-m_2wCk

If alpha and beta are the zeroes of the polynomial x^2+5x+5, find the value of α^-1 + β^-1.

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If x^2+1/x^2=27 find the value of x+1/x. If x2+1/x2=27 find the value of x+1/x. Polynomials class 9.

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